No Offer for Leighton Required in HOCHTIEF Tender Offer

This announcement and the information contained herein are restricted and are not for release, publication or distribution, in whole or in part, in or into the United States, Canada or Japan.

MADRID, October 20, 2010 - The Australian Securities and Investment Commission (ASIC)
has today advised ACS that it has made a decision not to grant the
application by HOCHTIEF AG to modify the Australian Corporations Act to
compel Grupo ACS (ACS, Actividades de Construcción y Servicios, S.A.) to make
an offer for HOCHTIEF's subsidiary Leighton Holdings (Leighton) as part of
its takeover offer for HOCHTIEF. HOCHTIEF holds a stake of 54.5 percent in
Leighton.

Under Australian law, companies making an offer for another
company listed on an approved foreign exchange generally do not need to
submit an additional offer for its subsidiary ("downstream acquisition
exemption"). In deciding not to grant the relief sought by HOCHTIEF ASIC has
confirmed that position.

ACS has no intention of making any changes to the current
arrangements between Leighton and HOCHTIEF. ACS will proceed with its offer
for HOCHTIEF as planned and expects the acceptance period to begin by the end
of November. Following the successful completion of the offer, ACS will
support HOCHTIEF continuing its successful 27 year relationship with Leighton
in its existing form.

ACS notes the announcement by HOCHTIEF that they intend to apply to the
Takeovers Panel. ACS is confident that ASIC's decision will be confirmed by
the Takeovers Panel.

More information about the public tender offer is available at
www.acs-offer.com.

About Grupo ACS

Grupo ACS (ACS, Actividades de Construcción y Servicios, S.A.),
headquartered in Madrid/Spain, is a world leader in infrastructure
development. In 2009, the Group's revenues totaled EUR15,606 million. ACS
has more than 144,000 employees operating in 41 countries. ACS is listed on
the Madrid Stock Exchange.

Safe Harbour Statement

This announcement is neither an offer to purchase nor a solicitation of
an offer to sell HOCHTIEF Shares. Moreover, the announcement is neither an
offer to purchase nor a solicitation to purchase ACS Shares. The final terms
and further provisions regarding the public offer will be disclosed in the
offer document after the publication has been approved by the German Federal
Financial Supervisory Authority (Bundesanstalt für
Finanzdienstleistungsaufsicht). ACS reserves the right to deviate in the
final terms of the public offer from the basic information described herein.
Investors and holders of HOCHTIEF Shares are strongly recommended to read the
offer document and all documents in connection with the public offer as soon
as they are published, since they will contain important information.

Subject to certain exceptions to be approved by the relevant regulators
or certain facts to be ascertained, the public offer will not be made
directly or indirectly, in or into the United States, Canada, Australia,
Japan or any other jurisdiction where to do so would constitute a violation
of the laws of such jurisdiction, or by use of the mails or by any means or
instrumentality (including without limitation, facsimile transmission,
telephone and the internet) of interstate or foreign commerce, or any
facility of a national securities exchange, of the United States, Canada,
Australia or Japan. Accordingly, copies of this announcement or any
accompanying documents are not being, directly or indirectly, mailed or
otherwise distributed, forwarded or transmitted in, into or from the United
States, Canada, Australia or Japan.

The ACS Shares have not been, and will not be, registered under the US
Securities Act of 1933 or with any securities regulatory authority of any
state or other jurisdiction of the United States or under the applicable
securities laws of Canada, Australia and Japan. Accordingly, subject to
certain exceptions, the ACS Shares may not be offered or sold within the
United States or Canada, Australia and Japan or any other jurisdiction where
to do so would constitute a violation of the laws of such jurisdiction, or to
or for the account or benefit of any person in the United States, Canada,
Australia or Japan.

To the extent permissible under applicable law or regulation, and in
accordance with normal German market practice, ACS or its brokers (acting as
agents) may from time to time make certain purchases of, or arrangements to
purchase, directly or indirectly, HOCHTIEF Shares or any securities that are
immediately convertible into, exchangeable for, or exercisable for, HOCHTIEF
Shares, other than pursuant to the public offer, before, during or after the
period in which the offer remains open for acceptance. These purchases may
occur either in the open market at prevailing prices or in private
transactions at negotiated prices. Any information about such purchases will
be disclosed as required by law or regulation in Germany or other relevant
jurisdictions.

This announcement includes forward-looking statements about ACS, HOCHTIEF
and the enlarged group. By their nature, forward-looking statements involve
risks and uncertainties because they relate to events and depend on
circumstances that may or may not occur in the future. ACS cautions you that
forward-looking statements are not guarantees of future performance and
actual results of operations, financial condition and liquidity, and the
development of the industry in which ACS and HOCHTIEF operates may differ
materially from those made in or suggested by the forward-looking statements
contained in this announcement. Any forward-looking statements speak only as
at the date of this announcement. Except as required by applicable law, ACS
does not undertake any obligation to update or revise publicly any
forward-looking statement, whether as a result of new information, future
events or otherwise.

    Company Contacts:

    German and international media:

    Phoebe Kebbel
    Hering Schuppener Consulting
    Phone: +49-69-921874-77
    Mobile: +49-173-2862110
    pkebbel@heringschuppener.com

    Oda Wöltje
    Hering Schuppener Consulting
    Phone: +49-69-921874-47
    Mobile: +49(151)-15176631
    owoeltje@heringschuppener.com

    Australian media:

    Kate Inverarity
    Nightingale Communications
    Phone: +61-3-9614-6930
    Mobile: +61-413-163-020
    kate@nightingalecommunications.com.au

    Lisa Keenan
    Nightingale Communications
    Phone: +61-3-9614-6930
    Mobile: +61-409-150-771
    lisa@nightingalecommunications.com.au

    Investor Relations:

    Grupo ACS
    Avda. Pío XII, n 102
    28036 Madrid, Spain
    Tel: +34-91-343-92-00
    Fax: +34-91-343-94-56
    e-mail: infogrupoacs@grupoacs.com

Company Contacts: German and international media: Phoebe Kebbel, Hering Schuppener Consulting, Phone: +49-69-921874-77, Mobile: +49-173-2862110, pkebbel at heringschuppener.com; Oda Wöltje, Hering Schuppener Consulting, Phone: +49-69-921874-47, Mobile: +49(151)-15176631, owoeltje at heringschuppener.com;
Australian media: Kate Inverarity, Nightingale Communications, Phone: +61-3-9614-6930, Mobile: +61-413-163-020, kate at nightingalecommunications.com.au; Lisa Keenan, Nightingale Communications, Phone: +61-3-9614-6930, Mobile: +61-409-150-771, lisa at nightingalecommunications.com.au; Investor Relations: Grupo ACS, Avda. Pío XII, n 102
28036 Madrid, Spain, Tel: +34-91-343-92-00, Fax: +34-91-343-94-56, e-mail: infogrupoacs at grupoacs.com